Window-blind fastenek



JAMES M. EVARTS, OF NEW HAVEN, CONNECTICUT.

WINDOW-BLIND EASTENEE.

Specification of Letters lEatent No. 5,252, dated August 21, 1847.

T all whom 25 may concern Be it known that I, JAMES M. EVARTS, of the town of New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Window-Blind'Fasteners; and I do hereby declare that the following is a full, clear,

and exact description of the construction and operation thereof, reference being had to the accompanying drawings, which make part of this specication, in which* Figure 1, is a perspective view of the double catch, plate, spiral spring, &c., connected, and ready to be attached to the st-ile of the blind, A, representing the body of the catch; B, the plate by means of which it is to be attached to the blind, C, the spiral spring, with the pin, or bolt, inserted to sustain it in its proper position, permanently, D, the swell in the body of the catch, into which the end of the pin, or bolt, is inserted,

l and against which the end of the spiral shut, and Gr, the handle.

spring rests; a, the small slot which allows of the pin, or bolt being riveted at the end, E, the catch which fastens the blind back, or open, F, the catch which fastens the blind Fig. 2, is a perspective view of the double catch ready to be attached to the plate, B, Fig. 1, and to receive the spiral spring, and pin, or bolt, C, Fig. 1, showing the off set, and hole, at D, Figs. 1 and 2, for inserting the end of the pin, or bolt, and the small slot, a, Figs. 1 and 2, and the projecting part, b, against which the plate, B, Fig. 1, is to rest, with a hole, c, through which the pin, or bolt, C,

Fig. 1, is to be inserted through a slot in the plate, B, Fig. 1, and through the spiral spring, C, Fig. 1, to sustain the spring firmly in its place. The double catch is made of brass, or other suitable material, like those now in use, or of any other suitable form, or shape, with an of set as seen at d, Fig. 2, and with a part projecting on each side,'near the ofi' set, d, Fig. 2, and eX-I tending out, to a suitable distance, beyond the opposite edge of the body of the catch, as seen at b, Fig. 2, to rest against the plate, B, Fig. 1,when the spiral spring is extended; and closes the slot in the plate, B, against water, &c., when the blind is fastened back, or open, thereby preserving the spiral spring dry at all times. v

Through the projecting part, b, Fig. 2, a hole is to be drilled, as seen at 0, Fig. 2, to admit the pin, or bolt, C, Fig. 1, which passes through the slot in the plate, B, Fig. 1, and enters and passes, lengthwise, through the spiral spring,C, Fig. 1, and the end of the pin, or bolt, is inserted into a hole in the body of the catch, as seen at D, Figs. 1, and

2. The end of the lpin, or bolt, may then be riveted in the hole at D, Figs. 1, and 2, by introducing a suitable punch, or set, into the small slot, a, Figs. 1, and 2, so as to secure the pin, or bolt, permanently in its place, to steady the body of the catch in the plate B, Fig. 1, and to sustain the spiral spring, permanently, and keep it in its proper position. Or the pin, lor bolt, may be secured in the hole D, Figs. 1, and 2, by cutting a male screw on the end of the pin, or bolt, and a female screw in the hole D. This last method wouldl be found to be very convenient should the spiral spring ever fail, as it might then be very readily replaced. Or the pin, or bolt may be secured in any other convenient way, in the hole, or ofi' set, at D, Figs. 1, and 2.

The direction of the pin, or bolt, should be such as to bring the pin, or bolt, at an equal distance from the of set, at d, Fig. 2,

for the whole of the distance which it moves through the plate, B, Fig. 1, in fastening, or unfastening the catch, in order that the extremity of that end of the slot in the plate, B, Fig. 1, may be kept very near the pin, or bolt, in every position, and thus cause the pressure on the spiral spring to be equal.

The plate, B, Fig. 1, is made of"brass, or other suitable material, and of a suitable size to be screwed, or otherwise fastened, to the stile lof the blind, with a slot of suitable size to pass over the catch from E, Figs. 1, and 2, to d, Fig. 2, with a circular enlargement, if necessary, near the center of the slot, as seen at e, Fig. 1, to permit it to pass over the swell in the body of the catch, at D, Figs. 1, and 2. This plate, B, Fig. 1, is passed on to the body of the catch, from E, Figs. 1, and 2, to the off set, at d, Fig. 2, on to which it drops and allows the plate to rest against the projecting part, b, Fig. 2, and brings the other extremity of the slot in the plate to the proper position to insert the pin, or bolt, C, Fig. 1, through the hole c, Fig. 2, in the projecting part, b, Fig. 2, and through the slot in the plate B, Fig. 1, to enter the spiral spring C, Fig. 1, and passing through it, lengthwise, to enter the hole, at D, Figs. 1, and 2, to be secured as before described.

Fig, 8, represents the pin or boltwyhich sustains the spiral spring.

Fig. 4, represents a plan of the plate B, which is to be attached to the stile of the blind.

The advantages of my improvement over all other methods n ow in use consists in the simplicity of its construction. The Plate, by which it is attached to the stile of the blind,

sustaining the body of the catch, (either double orsingle, as maybe required,) in its proper position, by means of the off set, d, Fig. 2, and the projecting part, b, Fig. 2

l (which may becast on the body of the catch,) and the pin, or bolt, C, Fig. l, which also sustains the spiral spring, C, Fig. l, permanently in its position, throughout its .Y whole length, and allows it to work freely,

Without'any possibility of its being thrown out of its position by accident, or of its being subject to any irregularity by cramping.4 And by thisarrangement, dispensing with the shoulder pieces, and fulcrum pin,

which are necessary in those now in use. Also, by connecting the body of the catch, A, Figs. 1, and 2, with the plate, B, Fig. l, inthis manner, the projecting part, Z), Fig.

y. 2, of the catch closes the slot in the plate, on the outside, when the blind is fastened back,

or open, and prevents the storm from beating in and wetting the spiral spring, and thus secures the spring from corrosion, or rust; and also affords a smooth surface for painting, when deemed proper. And it can .be manufactured at less expense than those of much less value, or usefulness; and is suitable for every deseriptlon of window, or

door, blinds; or for doors or gates of any description, when either a double or single catch is required.

What I. claim as my invention, and desire to secure by Letters Patent, is-

The method of attachingthe spiral spring l JAMES M. EVARTS.

Vitnesses:

HENRY G. LAVIS, R. FITZGERALD. 

